5 Dafydd, Eli and Fabio are members of an amateur cycling club that holds a time trial each Sunday during the summer. The independent probabilities that Dafydd, Eli and Fabio take part in any one of these trials are \(0.6,0.7\) and 0.8 respectively. Find the probability that, on a particular Sunday during the summer:

1. none of the three cyclists takes part;
2. Fabio is the only one of the three cyclists to take part;
3. exactly one of the three cyclists takes part;
4. either one or two of the three cyclists take part.